|
||||
|
This display board was made by myself about 10 years ago. The resolution is 16 x 50 dot. It can be drove by 8255 card through PC parellel port and using Qbasic/Quickbasic program. |
|||
|
The back view is simple too. Using 74ls138 74ls154 to decode the
signal and 74ls04 to drive the each LED. That is only light one y-axis
LED but the x-axis can be light 16 led each time. Can display in English and in Chinese sentence depending on the software program. |
|||
|
I remember I almost gave up because it is not simple for both hardware and software for me when I studied in technical college. | |||
|
 |
|||